I'm using the stock tweats with Kappa 4 x 6 plates in the doors, running off a Pioneer Premiere DEH-P730 deck. They are VERY loud (i also have the high part of the EQ up high too.) Under higher powered applications, i'd probably look into a set of components rather than separates. A local (to me) G20 owner has a set of Polk components (I believe) and it sounds incredible.
If you want to use the stock tweats instead, let me know and i can find out the color code in the FSM (i think), or i could check tonight when i'm out, cause i think all the wiring and speakers are probalby in a box somewhere over at that guys house, or he might remember.
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Justin McClanahan
95 G20
15.4 @ 91.4mph (2.4 60ft

)
143.7whp and 131.4 ft.lbs
Primera (10:1) Intake Cam, HS CAI, HS Header, UR Pullies, 19* Timing, ACT, Lightened Stock Flywheel, GC/AGX, Pacesetter Short Shifter, and more stuff...